Washington state agencies post a wide variety of structured data on their websites as Excel downloads. You can find them all using the Access Washington federated search. By my count there are currently over 10,000 such tables. Individual downloads are great, but when agencies post tables in an open data portal like data.wa.gov or geography.wa.gov the underlying data can be retrieved in a dozen other formats as well.
NOTICE: As of June 6, 2024, WaTech has formally adopted its name change, eliminating CTS and OCIO.
In 2024, the Legislature passed SHB 1947, which eliminated the Office of the Chief Information Officer (OCIO) and incorporated all duties and responsibilities to Washington Technology Solutions (WaTech), as well as renamed the agency from Consolidated Technology Services (CTS) to WaTech. Previous references to the OCIO or CTS should be understood to refer to WaTech.